单项选择题

I can't accept your invitation ________I've already had an appointment with my friend.

A．which
B．that
C．in which
D．in that
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单项选择题
Where you live can make ________to the way you feel.
A．such difference
B．such a difference
C．it so different
D．not a difference
单项选择题
The Mars having water, ________
A．so it may have life
B．and there may be life
C．there may be life
D．which may have life
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